Get

In Your Inbox

Catster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

My Cat Is So Skinny I Can Feel Their Bones: Should I Worry? Vet-Reviewed Advice

Skinny cat

Many of us are so used to seeing large and overweight cats that it can be surprising to see a cat that is thin. That means it can be difficult for many people to determine if their cat is too thin. Maybe your cat has lost weight as they’ve aged, or maybe they suddenly seemed to be skin and bones one day. If you’re unsure if you should be concerned about your cat’s body condition, here’s what you need to know. The short answer to the question is yes, you should be concerned if your cat is noticeably skeletal or has rapidly lost a significant amount of weight.

divider single cat paw oct 2024

My Cat Is Skin and Bones! Should I Be Worried?

With a healthy cat, you should be able to lightly feel their ribs without being able to see them. You may also be able to feel the tops of the hip bones or parts of the spine, but there should be a layer of muscle and fat tissue over these bones, so they should not be visible.

If your cat’s skull appears thin, bony, and sunken, this is also absolutely cause for concern. In short-haired cats, you will likely be able to see their bones protruding if they become excessively thin. In long-haired cats, it can be much trickier, so become well acquainted with the way your cat’s body feels so you can notice if they start to feel too thin.

There are multiple diseases and conditions that can cause a cat to lose a significant amount of weight and become severely underweight. Some of them can even make your cat hungrier, but they don’t gain weight. Malnutrition, malabsorption, cancer, thyroid disease, kidney disease, diabetes, and other serious conditions can all cause your cat to lose weight and develop a dangerously low body condition score.

skinny cat
Image Credit: Aun25, Shutterstock

How Do I Know If My Cat’s Weight Is Healthy?

The best way to determine if your cat’s body weight is appropriate is a combination of looking at them, feeling them, comparing their current weight with their previous weight, and getting your vet involved. The cat body condition score is a widely used chart that breaks down a cat’s weight into one of nine categories. A score of 5 is considered ideal, while 7 is above ideal. Anything below 4 is considered too low, with a score of 1 being extremely and dangerously underweight.

This scale is used by veterinarians, based on a hands-on exam of the cat, to determine if the cat’s body weight is healthy. If your cat is scored 1–4, your vet will advise diagnostic tests to investigate the reason. 

Cat Body Condition Score Healthy Weight
You are free to use this image but we do require you to link back to Catster.com for credit

How to Help a Cat Gain Weight

If your cat is underweight due to a medical condition, it’s vital that you consult with a vet before making any changes to their diet. There are many nutritional considerations with a variety of diseases, and suddenly switching your cat to a food because it’s high in fat, calories, or protein could exacerbate your cat’s medical condition.

Need veterinary advice but can't get to the clinic? Catster recommends PangoVet, our online veterinary service. Talk to a vet online and get the answers and advice you need for your cat without having to leave your living room — all at an affordable price!

PangoVet_Mention-in-Content for PangoVet2 save money

If your cat is underweight due to malnutrition, which is common in cats that have recently been adopted or that were taken from hoarding situations, slowly introducing food and increasing feeding frequency and quantity is needed. When you come across a bony animal, the immediate reaction is to want to feed them a large amount of food. However, this can lead to refeeding syndrome, which can do far more harm than good. Ensure that you contact a vet regarding the best feeding strategy for your recently adopted cat. 

The slow introduction of small meals throughout the day is typically recommended to help a malnourished cat gain weight. The meals may increase in size over time, but large meals and large quantities of food should be avoided, especially in the beginning stages of reversing malnutrition. It’s best to work with a vet who can guide you through the process of getting your cat back to a healthy body weight. It can be overwhelming and confusing to do alone!

Cat Eating Tuna on a plate
Image By: Veera, Shutterstock

divider single cat paw oct 2024

In Conclusion

Understanding how to assess your cat’s body condition score and detect changes in it will allow you to seek help early if your cat loses weight in an unexplained way. 

Certain diseases that increase your cat’s appetite (and sometimes thirst) can also make your cat lose weight, so even if they are still eating normally, there might be reason to worry if they don’t keep their weight or even feel skinnier. When cats rapidly lose body weight, especially if they were overweight to begin with, they can develop lipidosis, which can lead to liver failure and death.

It’s extremely important for you to familiarize yourself with the look and feel of your cat’s body. This will allow you to pick up on weight loss while the change is still subtle, instead of missing weight loss until your cat is very ill. If you’re unsure if your cat’s body weight is healthy, check out the cat body condition score chart and contact your vet. If you think your cat is dangerously thin, they should immediately see a vet.

Related Read:


Featured Image Credit: Poto69, Shutterstock

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything cat

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.

How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Catster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.

Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

10 Best Soft-Sided Cat Carriers in 2025 – Reviews & Top Picks

Traveling with your cat can be a lot of work, especially if it’s an escape artist. Whether you want to hike with your...

Why Is My Kitten So Aggressive? 6 Likely Reasons & Vet-Approved Tips

It’s not uncommon for new cat owners to be surprised by their kitten’s aggressive behavior. Kittens are wild creatures still learning about the...

Whipworms in Cats: Causes, Signs & Care Tips

Roundworms, hookworms, tapeworms, and heartworms are all common internal parasites that can cause many health problems for cats.1 Their presence in your cat’s...

Kitty Horoscope: October Belongs to the Lovely Libra Cat

Astrological signs can tell us a lot about ourselves and how we function in the world. But does it just stop with people?...

More related

Persian Kittens for Sale in Kansas Breeders List 2025

Excited Cats advocates for adopting before shopping, though we fully understand there are many reasons for seeking a breeder. So, we encourage it...

Ask Dr. Paola – Sore Backs, Fighting & Breed Identification (April 7, 2025)

Welcome to our “Ask Dr. Paola” series, where every Monday we bring expert advice straight from Dr. Paola Cuevas (MVZ) to help our...

The Perils of Working From Home with a Demanding Cat

As I’m sure many of you know, one of the very few positives to come from the COVID-19 lockdowns is a greater appreciation...

My Cat Lost a Claw – Do Cat Claws Shed? Vet-Reviewed Facts & Advice

If you’ve found bits of your cat’s claws around the house, the good news is that this is a normal and healthy part...

Keep reading

Why Do Cats Stay Up All Night? Vet-Verified Behavior

Cats follow a different sleep cycle than humans and may keep you up at night with their activities. Cats are naturally more active during the early morning and evening because they are crepuscular. That said, you may face the issue...

tabby cat at night

Are Fiddle-Leaf Figs Toxic to Cats? Vet-Reviewed Houseplants Examined

With over 400,000 different land plant species on our beautiful green planet, indoor plants have become extremely popular. 1 Plants clean the air that you live in, are low maintenance, reduce noise, look nice, and add life to any space....

Catster_Are Are Fiddle-Leaf Figs Toxic to Cats

Will My Cat Calm Down After I Neuter Him? Vet Reviewed Behavioral Changes

Spaying and neutering are two common surgeries for cats, especially when they are still young kittens. Many new pet parents have questions about the procedures, though. For example, some wonder if male cats calm down after being neutered. It’s true...

vet putting on surgical suit to a cat after surgery

Can Cats Eat Rice Pudding? Vet Reviewed Nutrition Facts & FAQ

Sometimes, it can be tempting to treat our cats to a little bit of something we are enjoying, but it can be tricky to tell which foods are good for them and which are not. If you are wondering whether...

Can Cats Eat Rice Pudding

Can Cats Eat Sunflower Seeds? Vet-Verified Nutrition Facts & Considerations

Sunflower seeds are the edible gifts of the sunflower. Not only are they tasty, but they are nutritious and considered to be one of the healthiest snacks around. But can your beloved feline eat them, too? The quick answer is...

Can Cats Eat Sunflower Seeds

Can Cats Eat Pomegranate? Vet-Reviewed Facts & FAQ

One of the fun parts of owning a cat is giving them treats now and again. Though we stick with cat treats most of the time, sometimes it’s tempting to give them a bite of our food. But how healthy...

Can Cats Eat Pomegranate

Why Do Cats Roll Around on Their Backs? 7 Vet-Reviewed Reasons (With Infographic)

Cats are peculiar creatures and usually march to the beat of their own drum. Unlike dogs, cats can be particular, especially regarding their bellies. When a dog rolls over on their back and exposes their belly, the dog likely wants...

Fluffy domestic cat stretching on the sofa

Tiny Tiger Cat Food Review of 2025: Recalls, Pros & Cons

Review Summary Tiny Tiger is a cat food brand that’s sold exclusively on Chewy. However, Chewy does not state who manufactures Tiny Tiger cat foods, except that it is made in North America. They mention that some of their ingredients...

Tiny Tiger Cat Food Review